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25 // 25 //
>> 26 // $Id: G4NeutronElasticXS.cc 76889 2013-11-18 13:01:55Z gcosmo $
>> 27 //
26 // ------------------------------------------- 28 // -------------------------------------------------------------------
27 // 29 //
28 // GEANT4 Class file 30 // GEANT4 Class file
29 // 31 //
30 // 32 //
31 // File name: G4NeutronElasticXS 33 // File name: G4NeutronElasticXS
32 // 34 //
33 // Author Ivantchenko, Geant4, 3-Aug-09 35 // Author Ivantchenko, Geant4, 3-Aug-09
34 // 36 //
35 // Modifications: 37 // Modifications:
36 // 38 //
37 39
38 #include "G4NeutronElasticXS.hh" 40 #include "G4NeutronElasticXS.hh"
39 #include "G4Neutron.hh" 41 #include "G4Neutron.hh"
40 #include "G4DynamicParticle.hh" 42 #include "G4DynamicParticle.hh"
41 #include "G4ElementTable.hh" <<
42 #include "G4Material.hh" <<
43 #include "G4Element.hh" 43 #include "G4Element.hh"
>> 44 #include "G4ElementTable.hh"
44 #include "G4PhysicsLogVector.hh" 45 #include "G4PhysicsLogVector.hh"
45 #include "G4CrossSectionDataSetRegistry.hh" << 46 #include "G4PhysicsVector.hh"
46 #include "G4ComponentGGHadronNucleusXsc.hh" << 47 #include "G4GlauberGribovCrossSection.hh"
47 #include "G4HadronicParameters.hh" << 48 #include "G4HadronNucleonXsc.hh"
48 #include "Randomize.hh" << 49 #include "G4NistManager.hh"
49 #include "G4SystemOfUnits.hh" << 50 #include "G4Proton.hh"
50 #include "G4IsotopeList.hh" <<
51 #include "G4AutoLock.hh" <<
52 51
>> 52 #include <iostream>
53 #include <fstream> 53 #include <fstream>
54 #include <sstream> 54 #include <sstream>
55 55
56 G4PhysicsVector* G4NeutronElasticXS::data[] = << 56 using namespace std;
57 G4double G4NeutronElasticXS::coeff[] = {0.0}; <<
58 G4String G4NeutronElasticXS::gDataDirectory = <<
59 G4bool G4NeutronElasticXS::fLock = true; <<
60 <<
61 namespace <<
62 { <<
63 G4Mutex nElasticXSMutex = G4MUTEX_INITIALIZE <<
64 } <<
65 57
66 G4NeutronElasticXS::G4NeutronElasticXS() 58 G4NeutronElasticXS::G4NeutronElasticXS()
67 : G4VCrossSectionDataSet(Default_Name()), << 59 : G4VCrossSectionDataSet("G4NeutronElasticXS"),
68 neutron(G4Neutron::Neutron()) << 60 proton(G4Proton::Proton()), maxZ(92)
69 { 61 {
70 // verboseLevel = 0; 62 // verboseLevel = 0;
71 if (verboseLevel > 0){ << 63 if(verboseLevel > 0){
72 G4cout << "G4NeutronElasticXS::G4NeutronE 64 G4cout << "G4NeutronElasticXS::G4NeutronElasticXS Initialise for Z < "
73 << MAXZEL << G4endl; << 65 << maxZ + 1 << G4endl;
74 } 66 }
75 ggXsection = << 67 data.resize(maxZ+1, 0);
76 G4CrossSectionDataSetRegistry::Instance()- << 68 coeff.resize(maxZ+1, 1.0);
77 if (ggXsection == nullptr) << 69 ggXsection = new G4GlauberGribovCrossSection();
78 ggXsection = new G4ComponentGGHadronNucleu << 70 fNucleon = new G4HadronNucleonXsc();
79 SetForAllAtomsAndEnergies(true); << 71 isInitialized = false;
80 FindDirectoryPath(); <<
81 } 72 }
82 73
83 G4NeutronElasticXS::~G4NeutronElasticXS() 74 G4NeutronElasticXS::~G4NeutronElasticXS()
84 { 75 {
85 if (isFirst) { << 76 delete fNucleon;
86 for(G4int i=0; i<MAXZEL; ++i) { << 77 /*
87 delete data[i]; << 78 for(G4int i=0; i<=maxZ; ++i) {
88 data[i] = nullptr; << 79 delete data[i];
89 } <<
90 } 80 }
>> 81 */
91 } 82 }
92 83
93 void G4NeutronElasticXS::CrossSectionDescripti 84 void G4NeutronElasticXS::CrossSectionDescription(std::ostream& outFile) const
94 { 85 {
95 outFile << "G4NeutronElasticXS calculates th 86 outFile << "G4NeutronElasticXS calculates the neutron elastic scattering\n"
96 << "cross section on nuclei using da 87 << "cross section on nuclei using data from the high precision\n"
97 << "neutron database. These data ar 88 << "neutron database. These data are simplified and smoothed over\n"
98 << "the resonance region in order to 89 << "the resonance region in order to reduce CPU time.\n"
99 << "For high energies Glauber-Gribiv << 90 << "G4NeutronElasticXS is valid for energies up to 20 MeV, for all\n"
>> 91 << "targets through U.\n";
100 } 92 }
101 93
102 G4bool 94 G4bool
103 G4NeutronElasticXS::IsElementApplicable(const 95 G4NeutronElasticXS::IsElementApplicable(const G4DynamicParticle*,
104 G4int, const G4Material*) 96 G4int, const G4Material*)
105 { 97 {
106 return true; 98 return true;
107 } 99 }
108 100
109 G4bool G4NeutronElasticXS::IsIsoApplicable(con <<
110 G4i <<
111 con <<
112 { <<
113 return false; <<
114 } <<
115 <<
116 G4double 101 G4double
117 G4NeutronElasticXS::GetElementCrossSection(con 102 G4NeutronElasticXS::GetElementCrossSection(const G4DynamicParticle* aParticle,
118 G4int Z, const G4Material*) 103 G4int Z, const G4Material*)
119 { 104 {
120 return ElementCrossSection(aParticle->GetKin << 105 G4double xs = 0.0;
121 aParticle->GetLogKineticEnergy(), Z << 106 G4double ekin = aParticle->GetKineticEnergy();
122 } <<
123 107
124 G4double << 108 if(Z < 1 || Z > maxZ) { return xs; }
125 G4NeutronElasticXS::ComputeCrossSectionPerElem <<
126 const G4ParticleDefinition*, <<
127 const G4Element* elm, <<
128 const G4Material*) <<
129 { <<
130 return ElementCrossSection(ekin, loge, elm-> <<
131 } <<
132 <<
133 G4double G4NeutronElasticXS::ElementCrossSecti <<
134 { <<
135 G4int Z = (ZZ >= MAXZEL) ? MAXZEL - 1 : ZZ; <<
136 auto pv = GetPhysicsVector(Z); <<
137 109
138 G4double xs = (ekin <= pv->GetMaxEnergy()) ? << 110 G4int Amean = G4lrint(G4NistManager::Instance()->GetAtomicMassAmu(Z));
139 : coeff[Z]*ggXsection->GetElasticElementCr << 111 G4PhysicsVector* pv = data[Z];
140 << 112 // G4cout << "G4NeutronElasticXS::GetCrossSection e= " << ekin
141 << 113 // << " Z= " << Z << G4endl;
142 #ifdef G4VERBOSE << 114
143 if(verboseLevel > 1) { << 115 // element was not initialised
144 G4cout << "Z= " << Z << " Ekin(MeV)= " << << 116 if(!pv) {
145 << ", nElmXSel(b)= " << xs/CLHEP::barn << 117 Initialise(Z);
146 << G4endl; << 118 pv = data[Z];
>> 119 if(!pv) { return xs; }
>> 120 }
>> 121
>> 122 G4double e1 = pv->Energy(0);
>> 123 if(ekin <= e1) { return (*pv)[0]; }
>> 124
>> 125 G4int n = pv->GetVectorLength() - 1;
>> 126 G4double e2 = pv->Energy(n);
>> 127
>> 128 if(ekin <= e2) {
>> 129 xs = pv->Value(ekin);
>> 130 } else if(1 == Z) {
>> 131 fNucleon->GetHadronNucleonXscPDG(aParticle, proton);
>> 132 xs = coeff[1]*fNucleon->GetElasticHadronNucleonXsc();
>> 133 } else {
>> 134 ggXsection->GetIsoCrossSection(aParticle, Z, Amean);
>> 135 xs = coeff[Z]*ggXsection->GetElasticGlauberGribovXsc();
147 } 136 }
148 #endif <<
149 return xs; <<
150 } <<
151 <<
152 G4double <<
153 G4NeutronElasticXS::ComputeIsoCrossSection(G4d <<
154 const G4ParticleDefinition* <<
155 G4int Z, G4int A, <<
156 const G4Isotope*, const G4E <<
157 const G4Material*) <<
158 { <<
159 return ElementCrossSection(ekin, loge, Z)*A/ <<
160 } <<
161 <<
162 G4double <<
163 G4NeutronElasticXS::GetIsoCrossSection(const G <<
164 G4int Z, G4int A, <<
165 const G4Isotope*, const G4Eleme <<
166 const G4Material*) <<
167 { <<
168 return ElementCrossSection(aParticle->GetKin <<
169 aParticle->GetLogKineticEnergy(), Z <<
170 <<
171 } <<
172 137
173 const G4Isotope* G4NeutronElasticXS::SelectIso << 138 if(verboseLevel > 0){
174 const G4Element* anElement, G4double, G4 << 139 G4cout << "ekin= " << ekin << ", XSinel= " << xs << G4endl;
175 { <<
176 G4int nIso = (G4int)anElement->GetNumberOfIs <<
177 const G4Isotope* iso = anElement->GetIsotope <<
178 <<
179 //G4cout << "SelectIsotope NIso= " << nIso < <<
180 if(1 == nIso) { return iso; } <<
181 <<
182 const G4double* abundVector = anElement->Get <<
183 G4double q = G4UniformRand(); <<
184 G4double sum = 0.0; <<
185 <<
186 // isotope wise cross section not used <<
187 for (G4int j=0; j<nIso; ++j) { <<
188 sum += abundVector[j]; <<
189 if(q <= sum) { <<
190 iso = anElement->GetIsotope(j); <<
191 break; <<
192 } <<
193 } 140 }
194 return iso; << 141 return xs;
195 } 142 }
196 143
197 void 144 void
198 G4NeutronElasticXS::BuildPhysicsTable(const G4 145 G4NeutronElasticXS::BuildPhysicsTable(const G4ParticleDefinition& p)
199 { 146 {
>> 147 if(isInitialized) { return; }
200 if(verboseLevel > 0){ 148 if(verboseLevel > 0){
201 G4cout << "G4NeutronElasticXS::BuildPhysic 149 G4cout << "G4NeutronElasticXS::BuildPhysicsTable for "
202 << p.GetParticleName() << G4endl; 150 << p.GetParticleName() << G4endl;
203 } 151 }
204 if(p.GetParticleName() != "neutron") { 152 if(p.GetParticleName() != "neutron") {
205 G4ExceptionDescription ed; 153 G4ExceptionDescription ed;
206 ed << p.GetParticleName() << " is a wrong 154 ed << p.GetParticleName() << " is a wrong particle type -"
207 << " only neutron is allowed"; 155 << " only neutron is allowed";
208 G4Exception("G4NeutronElasticXS::BuildPhys 156 G4Exception("G4NeutronElasticXS::BuildPhysicsTable(..)","had012",
209 FatalException, ed, ""); 157 FatalException, ed, "");
210 return; 158 return;
211 } 159 }
212 if (fLock || isFirst) { << 160 isInitialized = true;
213 G4AutoLock l(&nElasticXSMutex); <<
214 if (fLock) { <<
215 isFirst = true; <<
216 fLock = false; <<
217 FindDirectoryPath(); <<
218 } <<
219 161
220 // Access to elements << 162 // check environment variable
221 const G4ElementTable* table = G4Element::G << 163 // Build the complete string identifying the file with the data set
222 for ( auto & elm : *table ) { << 164 char* path = getenv("G4NEUTRONXSDATA");
223 G4int Z = std::max( 1, std::min( elm->Ge << 165
224 if ( nullptr == data[Z] ) { Initialise(Z << 166 G4DynamicParticle* dynParticle =
>> 167 new G4DynamicParticle(G4Neutron::Neutron(),G4ThreeVector(1,0,0),1);
>> 168
>> 169 // Access to elements
>> 170 const G4ElementTable* theElmTable = G4Element::GetElementTable();
>> 171 size_t numOfElm = G4Element::GetNumberOfElements();
>> 172 if(numOfElm > 0) {
>> 173 for(size_t i=0; i<numOfElm; ++i) {
>> 174 G4int Z = G4int(((*theElmTable)[i])->GetZ());
>> 175 if(Z < 1) { Z = 1; }
>> 176 else if(Z > maxZ) { Z = maxZ; }
>> 177 //G4cout << "Z= " << Z << G4endl;
>> 178 // Initialisation
>> 179 if(!data[Z]) { Initialise(Z, dynParticle, path); }
225 } 180 }
226 l.unlock(); <<
227 } 181 }
>> 182 delete dynParticle;
228 } 183 }
229 184
230 const G4String& G4NeutronElasticXS::FindDirect << 185 void
>> 186 G4NeutronElasticXS::Initialise(G4int Z, G4DynamicParticle* dp,
>> 187 const char* p)
231 { 188 {
232 // build the complete string identifying the << 189 if(data[Z]) { return; }
233 if (gDataDirectory.empty()) { << 190 const char* path = p;
234 std::ostringstream ost; << 191 if(!p) {
235 ost << G4HadronicParameters::Instance()->G << 192 // check environment variable
236 gDataDirectory = ost.str(); << 193 // Build the complete string identifying the file with the data set
>> 194 path = getenv("G4NEUTRONXSDATA");
>> 195 if (!path) {
>> 196 G4Exception("G4NeutronElasticXS::Initialise(..)","had013",
>> 197 FatalException,
>> 198 "Environment variable G4NEUTRONXSDATA is not defined");
>> 199 return;
>> 200 }
>> 201 }
>> 202 G4DynamicParticle* dynParticle = dp;
>> 203 if(!dp) {
>> 204 dynParticle =
>> 205 new G4DynamicParticle(G4Neutron::Neutron(),G4ThreeVector(1,0,0),1);
237 } 206 }
238 return gDataDirectory; <<
239 } <<
240 <<
241 void G4NeutronElasticXS::InitialiseOnFly(G4int <<
242 { <<
243 G4AutoLock l(&nElasticXSMutex); <<
244 Initialise(Z); <<
245 l.unlock(); <<
246 } <<
247 207
248 void G4NeutronElasticXS::Initialise(G4int Z) << 208 G4int Amean = G4lrint(G4NistManager::Instance()->GetAtomicMassAmu(Z));
249 { <<
250 if(data[Z] != nullptr) { return; } <<
251 209
252 // upload data from file 210 // upload data from file
253 data[Z] = new G4PhysicsLogVector(); 211 data[Z] = new G4PhysicsLogVector();
254 212
255 std::ostringstream ost; 213 std::ostringstream ost;
256 ost << FindDirectoryPath() << Z ; << 214 ost << path << "/elast" << Z ;
257 std::ifstream filein(ost.str().c_str()); 215 std::ifstream filein(ost.str().c_str());
258 if (!filein.is_open()) { << 216 if (!(filein)) {
259 G4ExceptionDescription ed; 217 G4ExceptionDescription ed;
260 ed << "Data file <" << ost.str().c_str() 218 ed << "Data file <" << ost.str().c_str()
261 << "> is not opened!"; 219 << "> is not opened!";
262 G4Exception("G4NeutronElasticXS::Initialis 220 G4Exception("G4NeutronElasticXS::Initialise(..)","had014",
263 FatalException, ed, "Check G4P << 221 FatalException, ed, "Check G4NEUTRONXSDATA");
264 return; 222 return;
265 } << 223 }else{
266 if(verboseLevel > 1) { << 224 if(verboseLevel > 1) {
267 G4cout << "file " << ost.str() << 225 G4cout << "file " << ost.str()
268 << " is opened by G4NeutronElasticXS" << << 226 << " is opened by G4NeutronElasticXS" << G4endl;
269 } << 227 }
270 228
271 // retrieve data from DB << 229 // retrieve data from DB
272 if(!data[Z]->Retrieve(filein, true)) { << 230 if(!data[Z]->Retrieve(filein, true)) {
273 G4ExceptionDescription ed; << 231 G4ExceptionDescription ed;
274 ed << "Data file <" << ost.str().c_str() << 232 ed << "Data file <" << ost.str().c_str()
275 << "> is not retrieved!"; << 233 << "> is not retrieved!";
276 G4Exception("G4NeutronElasticXS::Initialis << 234 G4Exception("G4NeutronElasticXS::Initialise(..)","had015",
277 FatalException, ed, "Check G4PARTICLEXSDAT << 235 FatalException, ed, "Check G4NEUTRONXSDATA");
278 return; << 236 return;
279 } << 237 }
280 // smooth transition << 238
281 G4double sig1 = (*(data[Z]))[data[Z]->GetVe << 239 // smooth transition
282 G4double ehigh = data[Z]->GetMaxEnergy(); << 240 size_t n = data[Z]->GetVectorLength() - 1;
283 G4double sig2 = ggXsection->GetElasticEleme << 241 G4double emax = data[Z]->Energy(n);
284 ehigh, Z, aeff[ << 242 G4double sig1 = (*data[Z])[n];
285 coeff[Z] = (sig2 > 0.) ? sig1/sig2 : 1.0; << 243 dynParticle->SetKineticEnergy(emax);
>> 244 G4double sig2 = 0.0;
>> 245 if(1 == Z) {
>> 246 fNucleon->GetHadronNucleonXscPDG(dynParticle, proton);
>> 247 sig2 = fNucleon->GetElasticHadronNucleonXsc();
>> 248 } else {
>> 249 ggXsection->GetIsoCrossSection(dynParticle, Z, Amean);
>> 250 sig2 = ggXsection->GetElasticGlauberGribovXsc();
>> 251 }
>> 252 if(sig2 > 0.) { coeff[Z] = sig1/sig2; }
>> 253 }
>> 254 if(!dp) { delete dynParticle; }
286 } 255 }
287 256